Pipe end finishing machine



Feb. 26, 1952 Q, R, SMITH 2,587,398

PIPE END FINISHING MACHINE Fi led March 11, 1949 Patented Feb. 26, 1952 UNITED PATENT OFFICE 2;;5137 98; RIPE Ennnmsnmg Qliyclt R; Fortv worth l-Texi Application Mai-can, 1949, @eria! sugar .7 5 was 1 1.

, 1 Themachine has been specially designed, for

preparing the ends of pipe, sections which. are

to;be welded to ether; In .w ldinsshipe sectio in alignment ,itis 7 common p ac ice to bevel the 7 adjacent ends ofthfifSGCSiOIlSgpSQyfllB-Q when-the;

ends a e brou ht to ether and int ali hin there 'willbev a groove around. said endsllto. lies; also. prior to the welding it ,is desirable that the beyelecipoi-tions ofqthe sections bemeleansed, of all rust or foreign.- A m t er; The, machines herein described has been providedfor cl ansin ancllconsii i ning t e. end

wire the. welding material;

of thepipeflsectionsi It is .a: further, object o t present invention to a proyidegamachine of: the character described.

hay n -a su po t flame w hmay he a ti lywinse c 'i tor h p pew th mea s t -re i centering the-tooLrelatiye to the pipe so that the; hey lcd n imein ma hec hd -mhd for welding. I

Ot r o j s ndadvan as sw ll be appa ent from the following specification which'is illusz at d b th a c mpa n .d au h swh r h? Figure lisa side eleyation of vthe machin t- 1y in section, taken on .the line ll of E gure 2. l a

Figure 2 is an, end elevation, and, t

i ure 3 is a s c ion YEW aken n glin 3-3 of Figure 2. I

Referring now more particularly to the draw:

ings where-in like numerals of references desig nate the-same parts in each of. the; figures, the numeral 1 designates a tubular. supportwhose inner end is ,open and" whose outer end is closedi Mounted axially in the support thereis ashaft 2 whose outer end isredueedandvfits throughan axial bearing-in theouter endofthesupport and secured, in. approved manner, on this reduced outer .end there is a crank; ineansof which the shaft may be turned.

j1fhe.. ;inner,end of the; shaft 2 in t-internally;

threadedand one end. of the expander shaft] is threaded into the adjacent end of the shaft 2 andsecured on the otherend of the shaft 4. there is a conicalshapedexpan'der 5 whichis moyable with the shaft 4 longitudinally of, the-support but is maintained against rotation by nieans o'f a pin 6 which-is fixed to the expander and which is movablein a longitudinal slot 1 in the support.

Therefore, by rotating the shaft 2 by means of the crank 3 the shaft 4 andexpander 5 may be moi/ed longitudinally .of the support I The end the Support asrheiadsje ing cylinders 8 secured thereto in any preferred manner, three of said cylinders being shown.

In the cylinders 8 there ,anethe ancho h ch a e adi sfiab e a d el e cylin er Th w hner \e siia the inner;wal1,..0the,pil? as H, mm which they are inserted.

Upon rotation of thecrank-3 in one direction the shaft 4 and the expander will be moved n of the pipe so as tose curely anchor the machine lative t t pipe Each rods is'provided with a spring seat l2" therearound and a spring l3' surrounds said rod and isseated on saidseat .withits outer end in contact with a, cap M which is screwed onto the outer end of each cylinderfll': The springs rsre maintained under compression .so" thatwhen the crank 3 is'lrotated in the other direction so as tomove the shaft sand expander fi'in a direction opposite'to that indicatedby tharrow-"in Figure 1 and the expander is released fron the inner ends of the rods 9 said rods and the-pipe anchors lllwillbe moyed radially inwardly under theinfluence of said springs'so as to-clear'the pipe in order that themachine may beremoyed from the pipe. There is a tapering grinding wheel I5-Whi0l1 is provided with radial spoke to whoseouter ends are secured to said wheel andwhose -inner ends are secured to'an annulus IT. This annulus surrounds and is spaced-from support -i and secured to the outer side thereof thereis a gearwheel '8;

Fixed on the outer end of :thesupport I and,

preferably, ,detachab'ly securedv thereto, there is a frame: I 9 which uupstands from said support and whose upper .endis formedwith, an elongated 7 bearing 29 in parallel relation with said su port tate. The; outer .end o th s cra hah has a and in whicha crank shaft 2| is ngmntecl t .1,

crank a my 22 thereon by mean o i h Said shar-tmayhc-mtated and fi ed on the i e n of the-shaft 2| there is a gear wheel 23 which is in mesh-with the. gear wheel 18 and by means of whichsaid gear wheel and. the grinding wheel 15' maybe rotated,

The pitch-of the grinding wheel 15 is substanof the pipe section H. "The inner face "of the grinding vwheel 15 is covered by .an abrasive fil i face 24; such as sand paper, or .the like, and which isbacked byja layer, 25 of resilient material such ber backing. are clamped to thefoperative face of the, wheel [5"by means of annular inside clamps, suchas 26, V26; which areclamped to the wheel 1.5 y suitable set bolts and'whose: i ner margins overlap, the corresponding margins of th rils-a $119K n s v nt, 611 abrasi e the direction" indicated the arrow in Figure 11 andith e \expanderwill force the rods gloutwarww ly'thus engaging the anchors. It? with the inside:

tiallytl e same asthe pitch of .the'adiacentend as rubhen. The "abrasiye material and the rubs brasive mat ria a fi lus 'rat t n 3 .t o the machine i assembled. as: Fi ure Mah i j le t d f bi hei' inea ib ithe "Whe i iqqm into contact with the beveled face to be cleansed and finished. The support I may be forced inwardly to place the spring -21 under compression. This spring surrounds the support I between the frame l9 and the gear wheel 18 and when the machine is anchored in place the abrasive sur face will be held yieldingly against the tapering face to be cleansed and finished.

When the machine is applied to the pipe, as above stated, and inward pressure is applied to place the spring 21 under the required compression the crank 3 is then turned in an anti-clockwise direction to move the shaft 4 in the direction indicated by the arrow in Figure 1 so as to force the rods 9 outwardly until the anchors Ill engage. securely with the inner wall of the pipe H. The

machine will thus be anchored to the pipe in position to operate and the spring 21 will be maintained under compression. 'If the pipe H is out of. round the anchors It] may be adjusted so that all of the anchors will contact with the pipe wall at the same time. The crank 22 is then rotated in either direction and the abrasive surface in contact with the tapering face of the pipe will cleanse and finish said tapering surface and will be maintained yieldingly thereagainst by the resilient support 25 for said friction surface as wellas by the compression spring 21 and the operation may continue for the required length of time to prepare the pipe end for welding.

The drawings and description are illustrative merely while the broad principle of the invention will be defined by the app-ended claims.

What I claim is:

1. A finishing machine comprising, a tubular support, aligned shafts mounted axially on the support and having a threaded connection, an expander on one of the shafts, means for rotating the other shaft, radial cylinders on the support, rods mounted to move axially in the cylinders, pipe engaging means on the outer ends of said rods and the inner ends of said rods being in operative relation with the expander, a tapering grinding wheel around the support having an inside abrasive surface, a gear wheel mounted for longitudinal movement with relation to the support and connected with said grinding wheel, a frame secured to the support, means mounted on the frame and geared to said gear wheel for rotating same and including a crank through which said rotating means may be actuated.

A finishing machine comprising, a tubular support, aligned shafts mounted axially on the support and'havinga threaded connection, an expander on one of the shafts, means for rotating the other shaft, radial cylinders on the support, rods mounted to move axially in the cylinders, pipe engaging means on the outer ends of said rods and the inner ends of said rods being in operthe expander, a taperingative. relation with grinding wheel around, the support having an inside abrasive surface, a gear wheel encircling the support and movable longitudinally thereof -and connected with said grinding wheel, a framesecured to the support, means mounted on the frame and gearedto said gear wheel for rotating same and including a crank through which said rotating means may be actuated, and a yieldable element between said frame and gear wheel and normally under compression.

3. A pipe end finishing machine comprising, a tubular support, aligned shafts mounted axially in the support and havinga threaded connection, an expander on one of the-shafts, means for rotating the other shaft. radial cylinders on the support, rods mounted to move axially in the cylinders, pipe engaging means on the outer ends of said rods engageable with the inside of said pipe to hold said support against rotation therein, the inner ends of said rods being in operative relation with the expander, a tapering grinding wheel around the support having a resiliently mounted inside abrasive surface, a gear wheel encircling the support and movable longitudinally relative thereto and connected with said grinding wheel, a frame secured to the support, means .mounted on the frame and geared to said gear wheel forrotating same and including a crank through which said rotating means may be actuated.

4. A pipe end finishing-machine comprising,

a tubular support,-aligned shafts mounted axially on the support and having a threaded connec-- tion, an expander on one of the shafts, means for rotating the other shaft, radial cylinders onthe support, rods mounted to be moved axially in the cylinders-bythe expander outwardly, means arranged to move the rods inwardly upon release of the expander from the rods, adjustable pipe engaging means on the outer ends of said rods,

a grinding wheelaround the support having an? abrasive surface resiliently mounted thereon, a gear wheel around the support and longitudinally movable relative thereto and connected with said grinding wheel, a frame secured to the support,

means-mounted on the frame and geared to said 3 gear wheel for-rotating same and including means.

through which said rotating means may be actuated, and a yieldable element between said frame and gear wheel and normally under compression for holding the abrasive surface yieldingly in contact with the work.

5. A pipe end finishing machine comprising, a tubular support, aligned shafts mounted axially .on the support and having a threaded connection, an expander on one of the shafts, means for rotating the other shaft, radial cylinders on the support, rods mounted to be moved outwardly axially of the cylinders by the expander, adjustable anchors on theouter ends of said rods engageable with the inside of said pipe upon outward movement of said rods for anchoring said support 1 against rotation in the pipe, a tapering grinding wheel around the support having an inner supporting face, a resilient backing mounted on said face, abrasive material on said backing, a gear' wheel around the support and movable longitudinally relative thereto and connected with said grinding. wheel, a frame secured to the support,'

means mounted on the frame and geared to said gear wheel for rotating the same and including means through which said rotating means may be actuated, and a yieldable element between said frame and gear wheel and normally under compression for holding the abrasive yieldinglyv in contact with the work.

OLIVER R. SMITH.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,196,208 Mahoney Mar. 10, 1931 2,180,640 Mikalson Nov. 21,1939" 2,338,484 Beverlin ';Jan-, l,1 944fj 2,363,102 Wachowitz- "Nov. 2 1} 194%? 2,414,731 Forbes Jan. 2 1', lq lfll 

